Cyclic
monoterpenoids having the iridane skeleton (1-isopropyl-2,3-di-methylcyclopentane), the traditional,
but not undisputed, numbering of which is shown in the diagram.
Source:
PAC, 1995, 67, 1307
(Glossary of class names of organic compounds and reactivity intermediates based on
structure (IUPAC Recommendations 1995))
on page 1344